The hybrid origin of the polyploid liverwort Pellia borealis

Odrzykoski, Ireneusz J.; Chudzińska, Ewa; Szweykowski, J.

doi:10.1007/bf00120221

Cited by 40 publications

(15 citation statements)

References 14 publications

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“…These reports are distributed randomly through the phylogeny of liverworts and include some genera: Ricca [69], Marchantia [70], Plagiochasma [71], Porella [72] and Pellia [73], but did not include epiphyllous liverworts with the putative exception of Trocholejeunea [74]. The absence of evidence may be a result of the limited cytological studies or special life cycle period-haploid gametophyte.…”

Section: Discussionmentioning

confidence: 99%

Empirical Evidence Supporting Frequent Cryptic Speciation in Epiphyllous Liverworts: A Case Study of the Cololejeunea lanciloba Complex

Heinrichs

Zhu

et al. 2013

PLoS ONE

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Cryptic species are frequently recovered in plant lineages, and considered an important cause for divergent of morphological disparity and species diversity. The identification of cryptic species has important implications for the assessment of conservation needs of species aggregates. The mechanisms and processes of the origin of cryptic species diversity are still poorly understand based on the lack of studies especially in context of environment factors. Here we explored evidence for cryptic species within the epiphyllous liverworts Cololejeunea lanciloba complex based on two loci, the plastid trnL-F region and the nuclear ribosomal ITS region. Several analytic approaches were employed to delimit species based on DNA sequence variation including phylogenetic reconstruction, statistical parsimony networks analysis and two recently introduced species delimitation criteria: Rosenberg’s reciprocal monophyly and Rodrigo’s randomly distinct. We found evidence for thirteen genetically distinct putative species, each consisting of more than one haplotype, rather than four morphologically-circumscribed species. The results implied that the highly conserved phenotypes are not congruent with the genetic differentiation, contributing to incorrect assessments of the biodiversity of epiphyllous liverworts. We hypothesize that evolution of cryptic species recovered may be caused by selection of traits critical to the survival in epiphyllous habitats combined with limited developmental options designed in the small body.

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Section: Discussionmentioning

confidence: 99%

Empirical Evidence Supporting Frequent Cryptic Speciation in Epiphyllous Liverworts: A Case Study of the Cololejeunea lanciloba Complex

Heinrichs

Zhu

et al. 2013

PLoS ONE

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“…However, in order to answer the question about progenitors of allopolyploid Calypogeia species more specimens from a wider range of geographic distribution have to be analyzed. Isozyme studies allowed to indicate progenitor species in the case of Porella baueri [10] and Pellia borealis [23]. In Calypogeia it is especially difficult since the genus comprises about 90 described species [2].…”

Section: Discussionmentioning

confidence: 99%

New taxon of the genus Calypogeia (Jungermanniales, Hepaticae) in Poland

Buczkowska

Bączkiewicz

2011

Acta Soc Bot Pol

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Genetic differentiation of Calypogeia muelleriana s.l. was studied using isozyme analysis. Two forms of this species: typical and atypical were reported from Poland. The 10 putative loci in 7 enzyme systems were analyzed in 58 samples: 34 of the typical and 15 of atypical form. The isozyme studies revealed that the typical and atypical forms of C. muelleriana in Poland are clearly genetically different. Typical plants morphologically correspond to the type specimen of C. muelleriana, but atypical form is a new, genetically distinct but unrecognized so far taxon. Each group is defined by several fixed alleles present in all populations. The UPGMA dendrogram based on Nei's genetic distances shows that both taxa (C. muelleriana and the newly detected taxon) clearly differ from C. azurea -the species used as a reference group. Genetic distance among two groups of C. muelleriana (D = 1.093) was almost the same as among C. azurea and the newly detected taxon (D = 1.060). Genetic distance among C. azurea and the typical form of C. muelleriana was the lowest (D = 0.628).

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“…The species have been designated species S and N (Szweykowski & Odrzykoski, 1990). Odrzykoski et al . (1996) found that the (gametophytically) diploid species, P. borealis , displayed fixed heterozygosity at three isozyme loci: Mpi1 , Dia1 and Aco .…”

Section: Sibling Speciation In Liverwortsmentioning

confidence: 99%

Biogeographic patterns and cryptic speciation in bryophytes

Shaw

2001

Journal of Biogeography

214

149

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Bryophytes (mosses, liverworts, hornworts) typically have broad geographical distributions that span two or more continents. Many species show classic patterns of disjunction that are similar to those found in many other groups of organisms (e.g. eastern Asia–eastern North America), and which are thought to result from fragmentation of previously continuous ranges (i.e. vicariance). However, in the bryophytes, these disjunctions often occur at the infra‐specific level and suggest that morphological uniformity may belie complex underlying genetic structure. Recent demonstrations of cryptic speciation, revealed by analyses of isozymes and DNA sequence variation, support the interpretation that genetic subdivision has occurred within some morphologically uniform species. Evidence for cryptic or nearly cryptic speciation exists for seven species of liverworts and seven mosses. In most (but not all) cases, cryptic species have broadly overlapping geographical ranges, although many are ecologically differentiated. Future work should focus on species that display ‘classic’ patterns of disjunction at higher taxonomic levels in other organisms (e.g. eastern North America–eastern Asia, eastern or western North America–Europe, Gondwanic), and should utilize explicitly phylogenetic approaches.

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The hybrid origin of the polyploid liverwort Pellia borealis

Cited by 40 publications

References 14 publications

Empirical Evidence Supporting Frequent Cryptic Speciation in Epiphyllous Liverworts: A Case Study of the Cololejeunea lanciloba Complex

Empirical Evidence Supporting Frequent Cryptic Speciation in Epiphyllous Liverworts: A Case Study of the Cololejeunea lanciloba Complex

New taxon of the genus Calypogeia (Jungermanniales, Hepaticae) in Poland

Biogeographic patterns and cryptic speciation in bryophytes

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